Confidential devotees of the Lord see in every step a benedictory direction of the Lord. What is considered to be an odd or difficult moment in the mundane sense is accepted as special mercy of the Lord.
(Srimad Bhagavatam----1:6:10----purport).

Actually a living being cannot be a nondevotee of the Lord because of his constitutional position, but when one becomes a nondevotee or nonbeliever, it is to be understood that the person concerned is not in a sound condition of life. The confidential devotees of the Lord treat such illusioned living beings, and therefore they are most pleasing in the eyes of the Lord. The Lord says in the Bhagavad-gītā that no one is dearer to Him than one who actually preaches the glories of the Lord to convert the nonbelievers and nondevotees.
(Srimad Bhagavatam----1:13:38----purport).

He played the part of the charioteer, while Arjuna was given the chance to play the fighter and thus become the hero of the Battle of Kurukñetra. What He wants to do Himself by His transcendental plans, He executes through His confidential devotees. That is the way of the Lord's mercy towards His pure unalloyed devotees.
(Srimad Bhagavatam----3:3:10----purport).

Kṛṣṇa, of course, means Kṛṣṇa and His confidential devotees; Kṛṣṇa is not alone. When we speak of Kṛṣṇa, "Kṛṣṇa" means Kṛṣṇa in His name, in His form, in His qualities, in His abode and in His associates. Kṛṣṇa is never alone, for the devotees of Kṛṣṇa are not impersonalists.
(Srimad Bhagavatam----3:25:38----purport).

The Lord and His confidential devotees appear many times to fulfill the Lord's mission, but since such births are transcendental, they are not accompanied by the miserable conditions of material birth, and they are therefore called divya, transcendental.
(Srimad Bhagavatam----4:20:34----purport).

The yogamāyā potency of Kṛṣṇa is transcendental and beyond the material energy, but the Lord exhibits His transcendental potency even within this material world just to satisfy His confidential devotees. Thus He appears in the material world to satisfy His devotees, and His qualities are so attractive that Kṛṣṇa Himself becomes eager to understand Himself.
(Teachings of Lord Caitanya).

The confidential devotees attached to the service of the Lord are divided into several categories: some of them are servants, some are friends, some are parents, and some are conjugal lovers. In devotional service with attachment, one has to follow a particular type of devotee of Vrajabhūmi.
(Teachings of Lord Caitanya).

There is a specific difference between the pure devotee and the confidential devotee. Different potencies of the Lord are engaged in serving the Supreme Lord in different transcendental relationships. They are situated in conjugal love, in parental affection, in friendship and in servitude. By impartially judging, one can find that the internal potencies of the Supreme Lord who are engaged in conjugal love with the Lord are the best of all devotees. Thus both internal devotees and confidential devotees are attracted by the conjugal love of the Supreme Absolute Truth. These are the most confidential devotees of Lord Caitanya. Other pure devotees, who are more or less attached to Śrī Nityānanda Prabhu and Advaita Prabhu, are attracted by other transcendental relationships, such as parental affection, friendship and servitorship. When such devotees are attached to the activities of Lord Caitanya, they at once become confidential devotees in conjugal love with the Supreme Lord.
(Teachings of Lord Caitanya).